EP 0873296 A1 19981028 - PROCESS FOR MANUFACTURING TEREPHTHALIC ACID
Title (en)
PROCESS FOR MANUFACTURING TEREPHTHALIC ACID
Title (de)
VERFAHREN ZUR HERSTELLUNG VON TEREPHTALISCHER SÄURE
Title (fr)
PROCEDE POUR FABRIQUER DE L'ACIDE TEREPHTALIQUE
Publication
Application
Priority
KR 9500185 W 19951230
Abstract (en)
[origin: WO9724310A1] This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing terephthalic acid in a high recovery rate with high purity in accordance with the practice of this invention comprising the following procedures: polyethylene terephthalate (hereinafter referred to as "PET") scrap is hydrolyzed with alkaline aqueous solution to give the slurry of terephthalic acid alkali metal/earth metal salt, then the particles of terephthalic acid formed from acid-neutralization are enlarged to recover terephthalic acid with high purity.
IPC 1-7
IPC 8 full level
C07C 27/02 (2006.01); C07C 51/09 (2006.01); C07C 51/43 (2006.01); C07C 63/26 (2006.01); C08J 11/16 (2006.01)
CPC (source: EP US)
C07C 51/09 (2013.01 - EP US)
Citation (search report)
See references of WO 9724310A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9724310 A1 19970710; DE 69522479 D1 20011004; DE 69522479 T2 20020508; EP 0873296 A1 19981028; EP 0873296 B1 20010829; JP 3140469 B2 20010305; JP H11502868 A 19990309; US 6075163 A 20000613
DOCDB simple family (application)
KR 9500185 W 19951230; DE 69522479 T 19951230; EP 95941923 A 19951230; JP 52421897 A 19951230; US 10100198 A 19980629